Projecticn apparatus



H. T. FLANIGAN.

PROJECTION APPARATUS.

APPLICATION FILED JUNE 24.1w).

.1 329, 892 Patented Feb. 3, 1920.

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H. T.'FLANIGAN.

PROJECTION APPARATUS.

APPLICATION FILED JUNE 24. 19I6.

1 ,329,892. Patented Eel). 3,1920.

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a citizen of the United 1 showing the position HOWARD '1. FLANIGAN, OF BUFFALO, NEW YORK.

PROJECTICN APPARATUS.

Specification of Letters Patent. Patent(l.Feb. 3, 1920.

Application filed June 24, 1916. Serial No. 105,738..

To all whom it may concern:

Be it known that I, HOWARD T. FLANIGAN, States, residing at Buffalo, in the county of Erie and State of New York, have invented a new and useful Improvement in Projection Apparatus, of which the following is a specification.

This invention relates to electric arc lamps in which the carbons are mounted at an angle to one another and more particularly to improvements in the carbon supporting and adjusting mechanisms of such lamps.

One object of the invention is to so mount the carbon holders or carrying members that the carbons may be readily simultaneously adjusted relatively to one another, as such adjustment becomes necessary in order to sustain the arc. Another object is toprovide simple and etficient means by which the pointsof the carbons can be first quickly brought in contact to start the arc and then separated to a proper distance to insure a suitable arc. Another object is to provide the carbon holders with release mechanism, whereby the holders can be quickly moved relative to the supporting frame when no accurate adjustment of the carbons carried by the holders is necessary, as for example, when it is desired to insert new carbons therein.

Other objects of the invention are to improve the carbon supporting and adjusting means in the respects hereinafter set out and claimed.

In the accompanying drawings Figure 1 is a lonoitudinal elevation of a stcreopticon of a well known tvpe. provided with carbon supporting and adjusting means embodyin the invention.

Fig. 2 1s a side elevation on an enlarged scale of the device removed from the lantern line s-Ai. F 2. showing the quick release device in locked position. V Fi 5 is a similar view showing the device in released position.

Fig. 6 is a fragmentary side elevation of the quick release device. v

Fig. 7 is a side elevation similarto Fig. 2, of the various parts thereof after the carbon has been partially consumed and the clamps have been properly adjusted.

.r- 1g. 9 is a section on an enlarged scale on line 9-9 of Fig. 7. r a

Fig. 10 is a detail on the same scale as Fig. 9, partly in section, of the device for holding the frame on its support.

F ig. 11 is a section on line 1111 of Fig. i

7, looking in the direction of the arrow.

Fig. 11 is a fragmentary transverse sectional elevation of the apparatus showing the manner of mounting the supporting member on the longitudinal sleeves or rods of the apparatus.

Fig. 12 is a side elevation of a modified construction of the device, on the same scale as Fig. 2. j

Fig. 13 is a section taken on line 13-13 of Fig. 12 showing the operating means for the carbon clamps.

15 represents a stereopticon or lamp of any suitable construction provided withthe lamp house 16, formed to contain the carbon supporting and adjusting mechanism of the lamp. The support 17 for the outer end of the bellows 18 and 1ens'19 is connected to the lamp house bv rods 20 which telescope in parallel longitudinal sleeves or tubes 21, the latter being fastened to the lamp in any suitable way and provided with, clamps 22 to se cure the rods in proper position within the tubes for focusing the lens. These tubes 21 are arranged in the same horizontal plane and only one is seen in Fig. 1. i

All these parts are old in the art and may be of anv suitable construction.

Referring first to the construction shown in Figs. 1-11 r 23 represents a carbon-supporting frame which is pivotallv mounted within the lamp house on a suitable support 24, in such a way that it can be tilted relatively to said support. The support 24 may be of any suitable construction and as shown, comprises a cross I to slide uponjthe longitudinal sleeves or tubes 21 so that'the support 24'may be readremoved from the lamp house at will by sliding the support to the rear ends of the lon itudinal sleeves or tubes 21. The supporting members 26 have set screws 27 for securing them 'inthe desired position on the tubes 21. Any other method of removably mounting the support within the lamp house can be used, however, if desired.

The carbon-supporting frame ily slid back and forth on the tubes 21 and 23.,while it y may be of any suitable construction, preferably comprises asubstantially U-shaped member, having diverging legs 28 and'29, and vertical portions 30 and 31 rising therefrom. The frame 23 is adjustably. secured on the rod 24 by any. suitable means, such as a sleevc 32 through which the rod 24 extends and which has a stud provided with a thumb or clamping nut 33. The stud and member 4-4 so that the-movement through holes in the members sleeve 32' are adapted to extend into a hole at the union of the two legs 28 and 29 of the frame 23so that the nut 33 when tightened clamps the rod 24 against the frame 23. The frame can he slid along the rod and'also tilted thereon. Vllhile the construction of the frame and its support and the method of mounting the frame on the support is preferably as shown, yet any other suitable construction and method of mounting the frame to the support whereby it can be tilted relatively thereto, can be, utilized, if preferred. 7

37 is a horizontal shaft which is suitably journaled on the upper parts of the vertical members 30 and 31 and has a screw-threaded portion .38 formed thereon. The shaft is provided with a finger wheel 39 one end thereof by means of which the shaft can be revolved. Below this shaft and parallel therewith is a guiderod-41 which is secured to the members 30 and 31, being preferably held in place by the screws 42 passing 30 and 31. The rod 41 connects and braces the members 30 and 31. r

Mounted on the frame 23 are the movable carbon supporting members 43 and 44, which serve to carry the carbons 45 and 46. The supporting member 43 for the horizontal carbon 45 is provided at its upper end with a suitable clamp or holder in W-l'llGl'l the carbon is-held and is movably mounted on the shaft 37 and rod 41 in such way that itcanbe moved along the same in either direction by turning the screw shaft in the proper direction, and this member 43 is operatively connected to the other supporting of the first member 43 in either direction will produce a corresponding movement of the other member 44. As shown the screw shaft and guide rod pass through holes in the supporting member. 43, and the lower end of the supportingn ember 43 has a lateral pinor part 48 which works in an inclined or curved slot 49 in the supporting member 44which is suitablymounted at 50 onthe frame 23 so as to swing vertically. ,The supporting member 43 andscrew shaft-are so constructed, however, that if desired the'member can be moved relatively to the screw shaft and independently thereof. This is often very advantageous as a time saver, forexample, when it is necessary to replace the burntout carbons fresh ones. While any suit- .at one end thereof.

able construction which accomplishes this purpose can be used, if desired, the preferred means are as follows Formed in the supporting member directly beneath the shaft opening 52 therein, is a transverse hole 53 in which is located the pin 54, which has a shoulder 55 formed A spring 56 having its upper end secured to the top of the member 43 in anysuitable way, as by a screw 56 has the lower extremity thereof engaging with the shoulder 55 of the pin 54, so that the pin is normally held in the position shown in Fig. 4. Thepin is provided with a groove or cut away portion 57 and this groove has screw threads 58 formed atone side thereof adapted to normally engage with the threads of the shaft 37 so that in the usual position of the pin 54 when the shaft 37 is revolved, the member 43 will be moved relatively thereto, as the pin 54 will beheld in such position by the spring 56 that the threads in the groove will be in engagement with. the threaded portion-of the shaft. If, however, it is desired to move the member 43 independently of the shaft 41, pressure is applied to the pin 54 so that the force of the spring is overcome, and the parts assume the position shown in Fig. 5. In this position the threads 58 formed in the groove 57 of the pin will be out of engagement with the threads of the shaft 37 and the member 43 can he slid along the shaft in either direction independently of the shaft and with no binding of the parts. i

The carbon clamp 47 may be of any suit able construction but, as shown in Fig. 9, preferably comprises a bent spring metal strip 59 provided with an operating screw 60 and nutfil so that the clamp can hold different size carbons. The head of the rew has a hole therein to receive the elecusualbinding screw 63 serves to hold the wire in place. 64 represents suitable insu ating material of any sort for insulating the clamp from the supporting member.

The carbon supporting; member 44 which carries the vertical carbon v46 at one extremity thereof is preferably pivoted to one leg of the frame 23 and passes through guide slots 66 and 67 formed in the legs of the frame. This supporting member preferably consists of two parallel strips 68 and 69 riveted together as shown, and the lower end of the supporting member 43, which is reduced in thickness, is confined between the two strips with the pin 48 thereof extending into duplicate slots 49 in the two strips. At one end of the member 44 is formed the operating handle 70. 72 represents a forked arm formed at the opposite extremity of the member between which is swiveled a holder or socket 73 for the vertical carbon-46, the s ket preferably being se ured to t e arms by screws 74. In order to hold the carbon securely in place in the socket, the hole which receives one of the screws 7a is eX- tended entirely through the wall of the socket and is screw threaded so that the'inner end of the screw will bear against the carbonand bind it securely in the socket.

WVhen the carbon carrier for the horizon; tal carbon is moved in either direction along the shaft 37, either by turning the shaft or by operating the quick release mechanism and sliding the holder on the shaft independently thereof, the projection 48 moving in the slot 49, causes a corresponding movement to be imparted to the vertical carbon supporting me nber which can swing freely on its pivot. The relative movement between the two carbon holders is determined in degree by the pitch of the cam slot, it of course being necessary to provide different shaped slots as the lamp is used with direct or alternating current.

A it is preferable to maintain the points of the carbons always at the same angle to each other, means are provided for keeping the lower carbon always in a substantially vertical position. As shown, the preferred means for accomplishing this result consist of a rod arm 7 6 projecting from the frame 23 and having at one end a loop 77 in which the upper partof the vertical carbon slides and is guided.

In the modified construction shown in Figs. 12 and 13, the carbon supporting frame 78 differs somewhat in shape from the frame 23 in the construction above described and in place of the horizontal carbon holder being actuated by a screw, a rack 7 9 and pinion 80 mounted on the frame and operated by the shaft 81 and handle piece 82 are used for such purpose. The holder or clamp 83 for the horizontal carbon is carried by the rack'79. The carbon-supporting arm 8% for the vertical carbon is also of slightly different construction, having the cam slot 85 formed near the upper edge thereof. In other respects the two constructions are substantially alike.

When it is desired to start the arc, the

current is first switched on and the handle portion at the end of the supporting arm for the vertical carbon is then pressed down so that the tip of the vertical carbon will be brought momentarily in contact with the tip of the horizontal carbon. By releasing the handle portion the. vertical carbon sup port will drop, because of gravity, into proper position for causing a continuing arc to result between the points of the carbons, and absolute accuracy in the. spacing between the carbon points necessary to obtain the best results can be maintained by proper adjustment'of the carbon-carrying support. with no liability of the operator grasping the wrong operating handle and spoiling the picture, as is often done while using machines of this general character. By means of the described manner of mounting the device in the lamp house, it can readily be removed therefrom when necessary to replace the carbons, while the quick release device heretofore described, allows the horizontal carbon carrier to be moved freely and rapidly relatively to the supporting frame without any movement of the adjusting screw.

I claim as my invention In an arc lamp, the combination of a frame, of carbon holders mounted on said frame and adapted to carry the carbons at anangle to each other, means for adjusting one of said carbon holders relatively to said frame, and a pin and slot connection be tween said carbon holders for causing the adjustment of one of said holders to imart a corresponding movement to said other holder, said slot being of suflicient width to permit one of said holders to be moved relatively to the other holder independently of said adjusting means for moving the carbons into contact to form an arc.

Witness my hand this 22nd day of June,

HOWARD T. FLANIGAN. Witnesses:

FRANK S. Ho'ronmss, WM. F. BOOKSER.

Such adjustment can be made' 

